Secret-ish items??

How did I only just find the cardboard wings and crown today?!

I stumbled across them on the DDV Wikia and rushed to the Dark Castle to grab them. But I’m curious - outside of the usual green chests or obvious storage areas, have you found anything ‘secret’ ish? Clothes or furniture? Anything really well hidden?

Also I unlocked the rainbow fox today and I love him <3

EDIT

I have:

The jungle crafting table from the Drawings quest The Monsters Inc secret gift from repairing the keycard The orb from the Dark Castle